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fs/proc: use __ro_after_init 

/proc/self inode numbers, value of proc_inode_cache and st_nlink of
/proc/$TGID are fixed constants.

Link: http://lkml.kernel.org/r/20180103184707.GA31849@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Alexey Dobriyan 2018-02-06 15:37:24 -08:00 committed by Linus Torvalds
parent 53f63345d8
commit efb1a57d90
4 changed files with 9 additions and 5 deletions
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5
fs/proc/base.c
View File

@ -75,6 +75,7 @@
#include <linux/ptrace.h>
#include <linux/tracehook.h>
#include <linux/printk.h>
#include <linux/cache.h>
#include <linux/cgroup.h>
#include <linux/cpuset.h>
#include <linux/audit.h>
@ -112,8 +113,8 @@
* in /proc for a task before it execs a suid executable.
*/
static u8 nlink_tid;
static u8 nlink_tgid;
static u8 nlink_tid __ro_after_init;
static u8 nlink_tgid __ro_after_init;
struct pid_entry {
const char *name;

3
fs/proc/inode.c
View File

@ -5,6 +5,7 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#include <linux/cache.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
@ -52,7 +53,7 @@ static void proc_evict_inode(struct inode *inode)
}
}
static struct kmem_cache * proc_inode_cachep;
static struct kmem_cache *proc_inode_cachep __ro_after_init;
static struct inode *proc_alloc_inode(struct super_block *sb)
{

3
fs/proc/self.c
View File

@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/cache.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/pid_namespace.h>
@ -30,7 +31,7 @@ static const struct inode_operations proc_self_inode_operations = {
.get_link = proc_self_get_link,
};
static unsigned self_inum;
static unsigned self_inum __ro_after_init;
int proc_setup_self(struct super_block *s)
{

3
fs/proc/thread_self.c
View File

@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/cache.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/pid_namespace.h>
@ -30,7 +31,7 @@ static const struct inode_operations proc_thread_self_inode_operations = {
.get_link = proc_thread_self_get_link,
};
static unsigned thread_self_inum;
static unsigned thread_self_inum __ro_after_init;
int proc_setup_thread_self(struct super_block *s)
{